Insulation monitoring device and monitoring method of power cell of electric vehicle
A technology of insulation monitor and power battery, applied in the direction of measuring resistance/reactance/impedance, instruments, measuring electricity, etc., can solve problems such as poor anti-leakage capacitance interference ability, inability to respond to short-circuit fault of power battery, and poor working stability.
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[0020] An electric vehicle power battery insulation monitor, used to monitor the insulation between the high voltage system 1 of the electric vehicle power battery and the vehicle chassis 2; the insulation monitor includes a voltage dividing current limiting resistor 4, a sampling resistor 5, a micro-processing Device 6, voltage DC / DC converter 7, voltage converter 8 and signal generator 9, signal collector 10, signal detector 11, CAN communication interface 13 and alarm 14 connected in sequence;
[0021] The automobile chassis 2, the high-voltage system 1 of the power battery, the voltage dividing current limiting resistor 4 and the sampling resistor 5 are connected in series in a loop to form a leakage detection circuit;
[0022] And signal generator 9 is connected with automobile chassis 1, microprocessor 6 respectively; Signal collector 10 is connected with sampling resistance 5 and is connected with microprocessor 6 by signal conditioning circuit 12; The processor 6 is co...
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